/Engine/Source/Runtime/Engine/Public/LightSceneProxy.h
Use to get the owning actor label (or component name as fallback, if the owner is null or ENABLE_DEBUG_LABELS is off) for diagnostic messages, debug or profiling. The actor label is what is shown in the UI (as opposed to the theFName).
const [FString](API\Runtime\Core\Containers\FString) & GetOwnerNameOrLabel() const